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1.
Almaz Zagidullin Yulia Ganushevich Vasili Miluykov Oleg Sinyashin Evamarie Hey-Hawkins 《Phosphorus, sulfur, and silicon and the related elements》2013,188(1-3):238-242
Abstract The reactivity of 1-alkyl-1,2-diphospholes in cycloaddition reactions with dienes, dienophiles or 1,3-dipoles was examined. 1-Alkyl-1,2-diphospholes (2 ) exhibit dual reactivity and act as diene toward maleic acid derivatives or as dienophiles with 2,3-dimethyl-1,3-butadiene. The 1-alkenyl-1,2-diphospholes (4 ) are readily involved in intramolecular [4 + 2] cycloaddition reactions leading to cage phosphines (5 ). Interaction of 1-alkyl-1,2-diphospholes (2) with 1,3-dipolar reagents (diphenyldiazomethane and nitrones) results in formation of the bicyclic phosphiranes (8) and dimers of 1-alkyl-1,2-diphosphole oxides (9) or bicyclic phosphine oxides (10) with a β-lactam moiety depending on temperature. 相似文献
2.
Petrov A. V. Zagidullin A. A. Burganov T. I. Shatalova N. I. Katsyuba S. A. Milyukov V. A. 《Russian Chemical Bulletin》2019,68(2):445-448
Russian Chemical Bulletin - A new method for the preparation of 2,3,4,5-tetraphenyl-1-octyl-1-monophosphole was developed. It was shown that the reaction of n-octyl chloride with a mixture of... 相似文献
3.
M. V. Zagidullin V. D. Nikolaev M. I. Svistun N. A. Khvatov E. V. Fomin 《Optics and Spectroscopy》2008,105(2):202-207
The concentrations of water vapor and O2(1Δ), as well as the temperature in the gas flow at the exit of a singlet oxygen generator, are determined using multichannel recording of the singlet oxygen emission spectrum in the bands at 634, 703, 762, and 1268 nm. The water vapor concentration is found from the intensity ratio of the 762-nm band, which corresponds to the 1Σ → 3Σ transition of the oxygen molecule, and the dimole emission band at 634 nm. From the ratio of the integrated intensities of the bands at 634 and 1268 nm, the O2(1Δ) concentration is determined and it is shown that the yield of O2(1Δ) at the exit from the gas generator is about 52%. The temperature of the gas flow, determined by the rotational structure of the oxygen emission spectrum in the band at 762 nm, is about 300 K under the nominal conditions of the gas generator operation. The ratio of the photon fluxes in the 703 and 634nm bands of the O2(1Δ) dimole emission is 1.06. The temperature dependence of the dimole emission bandwidths is determined, which can be used for estimating the gas temperature at the exit of the O2(1Δ) generator. 相似文献
4.
V. A. Milyukov I. A. Bezkishko A. A. Zagidullin O. G. Sinyashin E. Hey-Hawkins 《Russian Chemical Bulletin》2010,59(6):1232-1236
Reactions of sodium 3,4,5-triphenyl-1,2-diphosphacyclopentadienide with primary alkyl bromides, secondary alkyl iodides, and
silicon and tin chlorides gave stable 1-substituted 1,2-diphospholes. In a solution of 3,4,5-triphenyl-1-trimethylstannyl-1,2-diphosphacyclopenta-2,4-diene,
the Me3Sn group migrates between two phosphorus atoms. 相似文献
5.
A. A. Efremov A. I. Zagidullin M. V. Kolpakova R. M. Garipov O. V. Stoyanov 《Polymer Science Series D》2008,1(4):244-248
Organosilicon compounds used to improve the strength and adhesion properties, as well as the thermal stability, of epoxy compositions are reviewed. Properties of composition on the basis of bisphenol A-based ED-20 resin cured with a KrOOT-1 silicon-containing amine are described. 相似文献
6.
V. V. Plemenkov R. V. Ashirov O. A. Lodochnikova I. A. Litvinov R. N. Zagidullin 《Russian Journal of Organic Chemistry》2006,42(7):969-972
The Diels-Alder reaction of 1-methylcycloprop-2-ene-1-carbonitrile and coumalic acid methyl ester (methyl 2-oxo-2H-pyran-5-carboxylate) gave a 2:1 adduct with endo-syn configuration of both cyclopropane fragments, which was established by X-ray analysis. According to the 1H NMR data, the reaction involves intermediate formation of decarboxylated 1:1 adduct having a cycloheptatriene structure; its isomerization into the corresponding caradiene, followed by addition of the second dienophile molecule, was confirmed by quantum-chemical calculations. 相似文献
7.
Tristan Maxson Prof. Dr. Almaz S. Jalilov Dr. Matthias Zeller Prof. Dr. Sergiy V. Rosokha 《Angewandte Chemie (Weinheim an der Bergstrasse, Germany)》2020,132(39):17350-17354
Halogen bonding between two negatively charged species, tetraiodo-p-benzoquinone anion radicals (I4Q−.) and iodide anions, was observed and characterized for the first time. X-ray structural and EPR/UV–Vis spectral studies revealed that the anion–anion bonding led to the formation of crystals comprising 2D layers of I4Q−. anion radicals linked by iodides and separated by Et4N+ counter-ions. Computational analysis suggested that the seemingly antielectrostatic halogen bonds in these systems were formed via a combination of several factors. First, an attenuation of the interionic repulsion by the solvent facilitated close approach of the anions leading to their mutual polarization. This resulted in the appearance of positively charged areas (σ-holes) on the surface of the iodine substituents in I4Q−. responsible for the attractive interaction. Finally, the solid-state associations were also stabilized by multicenter (4:4) halogen bonding between I4Q−. and iodide. 相似文献
8.
9.
R. N. Zagidullin 《Chemistry of Heterocyclic Compounds》1989,25(11):1275-1279
A series of alkali and heavy metal dithio- and thiocarbamates based on N-(-aminoethyl)piperazine and its derivatives N-(-piperazinoethyl)imides, N-[(-2,5-dimethyl-1-pyrrolyl)ethyl]piperazine, and N-(-salicylideneaminoethyl)-piperazine is prepared. Methods for preparation of dithio- and thiocarbamates based on piperazine are improved. Alkali metal dithio- and thiocarbamates based on piperazines form polymeric complexes with heavy metals.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 11, pp. 1524–1528, November, 1989. 相似文献
10.
Ilyas S. Nizamov Gulnara T. Gabdullina Almaz R. Nurmukhametov Ilnar D. Nizamov Rafael A. Cherkasov 《Heteroatom Chemistry》2013,24(6):490-494
The ammonium salt of optically active dithiophosphoric acid obtained by the reaction of tetraphosphorus decasulfide with (1S)‐endo‐(–)‐borneol reacts with benzoyl chloride, methyl chloroacetate and epichlorohydrin to form novel dithiophosphate S‐esters. 相似文献